Abstract

In this Letter we present temporal decay patterns due to different relaxation mechanisms in various disordered systems. Thus, the disorder is modelled in terms of: (1) spatial distributions of defect sites, (2) self-similar, fractal geometries, (3) distributions of waiting times. For each of these models the decay form Φ( t) ≡ exp[−( t/τ)'] obtains under certain conditions, although the microscopic relaxation dynamics differ in every case.

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